body, div, span, html{
    margin: 0px;
    padding: 0px;
}
.main {
    background-color:#cccccc;
    width: 100%;
    height: 100%;
    padding: 1px;
}
.login-block {
    margin: 200px auto;
    padding:10px;
    width: 300px;
    background-color: #99cc00;
}